Titanium-pillared clays (Ti-PILCs) were obtained by different ways from TiCl_4, Ti(OC_3H_7)_4 and TiOSO_4, respectively. Mn-CeO_x/Ti-PILCs were then prepared and their activities of selective catalytic reduction (SCR) of NO with NH_3 at low-temperature were evaluated. Mn-CeO_x/Ti-PILCs were characterized by X-ray diffraction, N_2 adsorption, Fourier transform infrared spectroscopy, thermal analysis, temperature-programmed desorption of ammonia and H_2-temperature-programmed reduction. It was found that Ti-pillar tend to be helpful for the enlargement of surface area, pore volume, acidity and the enhancement of thermal stability for Mn-CeO_x/Ti-PILCs. Mn-CeO_x/Ti-PILCs catalysts were active for the SCR of NO. Among three resultant Mn-CeO_x/Ti-PILCs, the catalyst from TiOSO_4 showed the highest activity with 98% NO conversion at 220℃, it also exhibited good resistance to H_2O and SO_2 in flue gas. The catalyst from TiCl_4 exhibited the lowest activity due to the unsuccessful pillaring process.
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